3v4l.org

run code in 300+ PHP versions simultaneously
<?php $power = [4 => 20, 6 => 0, 18 => 5]; var_dump(array_filter($power)); foreach ($power as $id => $p) { if (0 === $p) { unset($power[$id]); } } var_dump($power);
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(2) { [4]=> int(20) [18]=> int(5) } array(2) { [4]=> int(20) [18]=> int(5) }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/nul2U on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/nul2U on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/nul2U on line 3
Process exited with code 255.
preferences:
204.18 ms | 401 KiB | 311 Q